甲苯、丙酮和乙酸乙酯在新型铂-钯/不锈钢丝网催化剂上的催化氧化

采用阳极氧化法制备了一种用于催化氧化处理挥发性有机化合物(VOCs)的0.1%Pt-0.5%Pd/不锈钢丝网(SSWM)催化剂. 活性测试结果表明, 0.1%Pt-0.5%Pd/不锈钢丝网催化剂具有较高的催化活性和热稳定性. 该催化剂上甲苯、丙酮和乙酸乙酯的完全氧化温度分别为220、260和280 ℃. 通过扫描电镜(SEM)、X射线光电子能谱(XPS)和超声波等手段对催化剂和不锈钢丝网进行了表征. SEM结果表明, 经阳极氧化工艺处理过的不锈钢金属丝网载体表面形成了一层沟壑形态的复合氧化膜. 该阳极氧化膜有利于活性组分Pd、Pt的分散.

Catalytic Oxidation of Toluene,Acetone and Ethyl Acetate on a New Pt-Pd/Stainless Steel Wire Mesh Catalyst

A new volatile organic compound(VOC)combustion catalyst of 0.1%Pt-0.5%Pd/stalnless steel wire mesh (SSWM)was prepared via anodic oxidation treatment.The result of activity tests for complete oxidation of toluene,acetone,and ethyl acetate showed that 0.1%Pt-0.5%Pd/steel wire mesh catalyst had good catalytic activity and thermal stability.The total oxidation temperature for toluene,acetone,and ethyl acetate was at 220,260,and 280℃ for the catalyst calcined at 500℃,respectively.The catalyst and stainless steel wire mesh support were characterized by means of scanning electron microscopy(SEM),X-ray photoelectron spectrum(XPS),and ultrasonic vibration tests.The SEM results indicated that a typical donga structure layer appeared on the surface of stainless steel wire mesh support after anodic oxidation procedure.This typical anodic oxidation film Was favorable for dispersing Pd and Pt components.